No lecture audio, no concept explanation, lots of copy & paste (It's roughly written in the expected question Q&A) In fact, you can learn the concepts and implement projects for various latest Android technologies just by referring to the official documentation and Googling, but the learning process can be more boring and long than you think, so I think it's okay to buy it if you want to skip that and just complete the project and learn. Conclusion: This is a lecture that teaches you how to set up a feast on the table and eat the rice, but omits information about each food and how to eat it deliciously.